/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/list-simple/dll2c_remove_all_reverse.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:22:12,224 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:22:12,227 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:22:12,263 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:22:12,264 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:22:12,266 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:22:12,267 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:22:12,270 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:22:12,272 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:22:12,273 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:22:12,275 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:22:12,276 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:22:12,277 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:22:12,278 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:22:12,279 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:22:12,281 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:22:12,282 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:22:12,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:22:12,312 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:22:12,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:22:12,317 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:22:12,319 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:22:12,320 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:22:12,321 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:22:12,324 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:22:12,325 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:22:12,325 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:22:12,326 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:22:12,327 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:22:12,328 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:22:12,329 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:22:12,330 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:22:12,331 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:22:12,332 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:22:12,333 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:22:12,334 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:22:12,335 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:22:12,335 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:22:12,335 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:22:12,337 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:22:12,338 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:22:12,341 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 01:22:12,369 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:22:12,369 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:22:12,371 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:22:12,371 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:22:12,372 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:22:12,372 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:22:12,372 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:22:12,372 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:22:12,373 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:22:12,373 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:22:12,373 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:22:12,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:22:12,374 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:22:12,374 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:22:12,374 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:22:12,375 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:22:12,375 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:22:12,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:22:12,375 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:22:12,376 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:22:12,376 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:22:12,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:22:12,377 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:22:12,377 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:22:12,377 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:22:12,377 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:22:12,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:22:12,378 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:22:12,378 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:22:12,378 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:22:12,818 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:22:12,844 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:22:12,848 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:22:12,849 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:22:12,850 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:22:12,851 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/dll2c_remove_all_reverse.i [2020-10-27 01:22:12,927 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/53fd6ea78/dd08397decd44943956c510e1a7239ae/FLAG7270d8c26 [2020-10-27 01:22:13,703 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:22:13,704 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-simple/dll2c_remove_all_reverse.i [2020-10-27 01:22:13,721 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/53fd6ea78/dd08397decd44943956c510e1a7239ae/FLAG7270d8c26 [2020-10-27 01:22:13,958 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/53fd6ea78/dd08397decd44943956c510e1a7239ae [2020-10-27 01:22:13,963 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:22:13,971 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:22:13,973 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:22:13,973 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:22:13,977 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:22:13,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:22:13" (1/1) ... [2020-10-27 01:22:13,982 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cad5ca1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:22:13, skipping insertion in model container [2020-10-27 01:22:13,982 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:22:13" (1/1) ... [2020-10-27 01:22:13,991 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:22:14,057 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:22:14,425 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:22:14,435 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:22:14,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:22:14,552 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:22:14,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:22:14 WrapperNode [2020-10-27 01:22:14,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:22:14,557 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:22:14,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:22:14,558 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:22:14,570 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:22:14" (1/1) ... [2020-10-27 01:22:14,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:22:14" (1/1) ... [2020-10-27 01:22:14,587 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:22:14" (1/1) ... [2020-10-27 01:22:14,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:22:14" (1/1) ... [2020-10-27 01:22:14,606 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:22:14" (1/1) ... [2020-10-27 01:22:14,611 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:22:14" (1/1) ... [2020-10-27 01:22:14,615 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:22:14" (1/1) ... [2020-10-27 01:22:14,630 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:22:14,631 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:22:14,631 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:22:14,631 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:22:14,632 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:22:14" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:22:14,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:22:14,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:22:14,711 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:22:14,711 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-27 01:22:14,711 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-27 01:22:14,711 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-27 01:22:14,711 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2020-10-27 01:22:14,711 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_create [2020-10-27 01:22:14,712 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_remove_last [2020-10-27 01:22:14,712 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:22:14,712 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:22:14,712 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:22:14,712 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:22:14,712 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:22:14,713 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:22:14,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:22:14,713 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-27 01:22:14,713 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-27 01:22:14,713 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 01:22:14,713 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 01:22:14,714 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 01:22:14,714 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 01:22:14,714 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 01:22:14,714 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 01:22:14,714 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 01:22:14,714 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 01:22:14,714 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 01:22:14,715 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 01:22:14,715 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 01:22:14,715 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 01:22:14,715 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 01:22:14,715 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 01:22:14,715 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 01:22:14,715 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 01:22:14,715 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 01:22:14,716 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 01:22:14,716 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 01:22:14,716 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 01:22:14,716 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 01:22:14,716 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 01:22:14,716 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 01:22:14,716 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 01:22:14,717 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 01:22:14,717 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 01:22:14,717 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 01:22:14,717 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 01:22:14,717 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 01:22:14,717 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 01:22:14,717 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 01:22:14,718 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 01:22:14,718 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 01:22:14,718 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 01:22:14,718 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 01:22:14,718 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 01:22:14,718 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 01:22:14,718 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 01:22:14,719 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 01:22:14,719 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 01:22:14,719 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 01:22:14,719 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 01:22:14,719 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 01:22:14,719 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 01:22:14,719 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 01:22:14,720 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 01:22:14,720 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 01:22:14,720 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 01:22:14,720 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 01:22:14,720 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 01:22:14,720 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 01:22:14,720 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 01:22:14,721 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 01:22:14,721 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 01:22:14,721 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 01:22:14,721 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 01:22:14,721 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 01:22:14,721 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 01:22:14,722 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 01:22:14,722 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 01:22:14,722 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 01:22:14,722 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 01:22:14,722 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 01:22:14,722 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 01:22:14,722 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 01:22:14,723 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 01:22:14,723 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 01:22:14,723 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 01:22:14,723 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 01:22:14,723 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 01:22:14,723 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 01:22:14,723 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 01:22:14,724 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 01:22:14,724 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 01:22:14,724 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 01:22:14,724 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 01:22:14,724 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 01:22:14,724 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 01:22:14,724 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 01:22:14,724 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 01:22:14,725 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 01:22:14,725 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 01:22:14,725 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 01:22:14,725 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 01:22:14,725 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 01:22:14,725 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 01:22:14,725 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 01:22:14,726 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 01:22:14,726 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 01:22:14,726 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 01:22:14,726 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 01:22:14,726 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 01:22:14,726 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 01:22:14,726 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 01:22:14,726 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 01:22:14,727 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 01:22:14,727 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 01:22:14,727 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 01:22:14,727 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 01:22:14,727 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 01:22:14,727 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 01:22:14,727 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 01:22:14,727 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-27 01:22:14,728 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2020-10-27 01:22:14,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 01:22:14,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 01:22:14,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:22:14,728 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_create [2020-10-27 01:22:14,728 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_remove_last [2020-10-27 01:22:14,728 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 01:22:14,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:22:14,729 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:22:14,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-10-27 01:22:14,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:22:14,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:22:14,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:22:14,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:22:15,273 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-27 01:22:15,463 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:22:15,463 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 01:22:15,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:22:15 BoogieIcfgContainer [2020-10-27 01:22:15,466 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:22:15,471 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:22:15,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:22:15,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:22:15,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:22:13" (1/3) ... [2020-10-27 01:22:15,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b3836f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:22:15, skipping insertion in model container [2020-10-27 01:22:15,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:22:14" (2/3) ... [2020-10-27 01:22:15,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b3836f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:22:15, skipping insertion in model container [2020-10-27 01:22:15,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:22:15" (3/3) ... [2020-10-27 01:22:15,487 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_remove_all_reverse.i [2020-10-27 01:22:15,500 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:22:15,505 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:22:15,521 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:22:15,565 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:22:15,565 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:22:15,565 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:22:15,566 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:22:15,566 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:22:15,566 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:22:15,566 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:22:15,566 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:22:15,590 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-10-27 01:22:15,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:22:15,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:22:15,603 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:22:15,603 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:22:15,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:22:15,613 INFO L82 PathProgramCache]: Analyzing trace with hash 379255624, now seen corresponding path program 1 times [2020-10-27 01:22:15,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:22:15,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075820118] [2020-10-27 01:22:15,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:22:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:15,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:16,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:16,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:16,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:22:16,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:22:16,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 504 [2020-10-27 01:22:16,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:16,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:22:16,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:22:16,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:22:16,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:22:16,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:22:16,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:16,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:16,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:16,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:22:16,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:16,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:22:16,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:16,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:22:16,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:22:16,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:22:16,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:16,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:22:16,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:16,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:16,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:16,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-27 01:22:16,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:16,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-27 01:22:16,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:16,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:22:16,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 01:22:16,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:22:16,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:16,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:22:16,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:16,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:16,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:16,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:22:16,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:16,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-27 01:22:16,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:16,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:22:16,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:22:16,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:22:16,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:16,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:22:16,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075820118] [2020-10-27 01:22:16,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:22:16,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 01:22:16,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155119442] [2020-10-27 01:22:16,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:22:16,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:22:16,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:22:16,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:22:16,783 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 7 states. [2020-10-27 01:22:17,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:22:17,115 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2020-10-27 01:22:17,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:22:17,117 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-27 01:22:17,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:22:17,125 INFO L225 Difference]: With dead ends: 76 [2020-10-27 01:22:17,125 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 01:22:17,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:22:17,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 01:22:17,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2020-10-27 01:22:17,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 01:22:17,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-27 01:22:17,176 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 26 [2020-10-27 01:22:17,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:22:17,176 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-27 01:22:17,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:22:17,176 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-27 01:22:17,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:22:17,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:22:17,179 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:22:17,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:22:17,179 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:22:17,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:22:17,180 INFO L82 PathProgramCache]: Analyzing trace with hash 2007713411, now seen corresponding path program 1 times [2020-10-27 01:22:17,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:22:17,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922380898] [2020-10-27 01:22:17,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:22:17,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:17,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:17,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:17,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:17,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:22:17,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:22:17,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 594 [2020-10-27 01:22:17,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:17,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:22:17,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:22:17,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:22:17,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:22:17,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:22:17,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:17,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:17,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:17,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:22:17,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:17,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 01:22:17,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:17,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:22:17,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:22:17,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:22:17,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:22:17,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:22:17,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:17,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:18,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:18,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:18,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:22:18,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:22:18,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-27 01:22:18,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:18,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:22:18,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:22:18,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:22:18,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:18,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:22:18,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:18,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:18,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:18,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:22:18,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:18,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 01:22:18,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:18,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:22:18,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:22:18,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:22:18,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:22:18,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 01:22:18,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:18,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:18,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:18,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:22:18,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:18,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 01:22:18,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:18,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:22:18,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:22:18,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:22:18,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:18,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 01:22:18,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922380898] [2020-10-27 01:22:18,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:22:18,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:22:18,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217711712] [2020-10-27 01:22:18,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:22:18,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:22:18,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:22:18,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:22:18,269 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 8 states. [2020-10-27 01:22:18,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:22:18,618 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2020-10-27 01:22:18,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:22:18,619 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-27 01:22:18,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:22:18,621 INFO L225 Difference]: With dead ends: 51 [2020-10-27 01:22:18,621 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 01:22:18,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:22:18,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 01:22:18,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2020-10-27 01:22:18,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 01:22:18,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-27 01:22:18,632 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 36 [2020-10-27 01:22:18,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:22:18,633 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-27 01:22:18,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:22:18,633 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-27 01:22:18,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 01:22:18,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:22:18,635 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:22:18,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:22:18,635 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:22:18,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:22:18,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1015437847, now seen corresponding path program 1 times [2020-10-27 01:22:18,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:22:18,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340095647] [2020-10-27 01:22:18,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:22:18,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:18,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:18,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:19,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:19,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:23,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:23,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 01:22:23,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:22:23,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 01:22:23,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:23,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:22:23,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:22:23,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:22:23,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:23,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:22:23,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:23,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:23,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:23,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:22:23,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:23,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:22:23,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:23,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:22:23,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:22:23,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:22:23,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:23,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:22:23,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:23,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:23,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:23,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:23,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:22:23,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:22:23,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-27 01:22:23,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:23,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:22:23,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:22:23,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:22:23,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:23,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:22:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:23,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:23,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:23,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:22:23,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:23,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 01:22:23,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:23,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:22:23,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:22:23,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:22:23,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:23,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 01:22:23,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:23,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:23,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:23,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:22:23,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:23,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:22:23,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:23,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:22:23,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:22:23,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:22:23,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:23,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-27 01:22:23,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:23,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:23,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:23,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:22:23,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:23,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:22:23,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:23,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:22:23,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:22:23,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:22:23,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:23,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 01:22:23,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340095647] [2020-10-27 01:22:23,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:22:23,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:22:23,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444172052] [2020-10-27 01:22:23,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:22:23,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:22:23,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:22:23,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:22:23,981 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 8 states. [2020-10-27 01:22:24,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:22:24,199 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2020-10-27 01:22:24,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:22:24,200 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-10-27 01:22:24,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:22:24,201 INFO L225 Difference]: With dead ends: 48 [2020-10-27 01:22:24,202 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 01:22:24,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:22:24,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 01:22:24,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-27 01:22:24,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 01:22:24,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-10-27 01:22:24,212 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 43 [2020-10-27 01:22:24,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:22:24,212 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-10-27 01:22:24,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:22:24,212 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-10-27 01:22:24,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 01:22:24,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:22:24,214 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:22:24,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:22:24,215 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:22:24,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:22:24,215 INFO L82 PathProgramCache]: Analyzing trace with hash 533583875, now seen corresponding path program 2 times [2020-10-27 01:22:24,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:22:24,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475550816] [2020-10-27 01:22:24,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:22:24,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:24,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:24,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:24,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:25,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:29,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:29,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 01:22:29,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:22:29,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 01:22:29,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:29,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:22:29,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 01:22:29,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:22:29,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:29,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:22:29,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:29,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:29,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:29,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:22:29,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:29,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:22:29,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:29,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:22:29,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:22:29,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:22:29,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:29,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:22:29,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:29,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:29,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:29,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:22:29,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:29,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 435 [2020-10-27 01:22:29,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:29,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:22:29,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:22:29,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:22:29,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:30,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:22:30,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:30,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:30,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:30,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:22:30,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:30,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 01:22:30,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:30,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:22:30,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:22:30,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:22:30,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:30,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 01:22:30,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:30,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:30,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:30,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:22:30,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:30,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-27 01:22:30,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:30,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:22:30,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:22:30,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:22:30,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:30,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-27 01:22:30,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:30,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:30,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:30,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:30,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:22:30,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:22:30,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-27 01:22:30,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:30,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:22:30,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:22:30,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:22:30,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:30,933 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 53 [2020-10-27 01:22:30,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-27 01:22:30,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:30,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:30,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:30,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:22:30,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:30,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 01:22:30,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:30,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:22:30,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:22:30,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:22:30,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:31,056 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:22:31,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475550816] [2020-10-27 01:22:31,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:22:31,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:22:31,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039032573] [2020-10-27 01:22:31,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:22:31,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:22:31,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:22:31,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:22:31,059 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 22 states. [2020-10-27 01:22:32,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:22:32,562 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2020-10-27 01:22:32,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:22:32,566 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2020-10-27 01:22:32,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:22:32,569 INFO L225 Difference]: With dead ends: 90 [2020-10-27 01:22:32,569 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 01:22:32,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:22:32,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 01:22:32,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-27 01:22:32,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 01:22:32,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2020-10-27 01:22:32,587 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 50 [2020-10-27 01:22:32,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:22:32,587 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2020-10-27 01:22:32,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:22:32,588 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2020-10-27 01:22:32,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 01:22:32,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:22:32,590 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:22:32,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:22:32,590 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:22:32,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:22:32,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1054764027, now seen corresponding path program 1 times [2020-10-27 01:22:32,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:22:32,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902058157] [2020-10-27 01:22:32,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:22:32,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:32,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:32,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:32,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 01:22:32,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:32,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 381 [2020-10-27 01:22:32,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:32,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:22:32,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-27 01:22:32,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:22:32,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:33,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:22:33,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:33,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:33,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:33,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:22:33,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:33,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:22:33,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:33,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:22:33,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:22:33,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:22:33,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:33,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:22:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:33,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:33,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:33,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:22:33,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:33,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 01:22:33,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:33,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:22:33,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:22:33,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:22:33,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:33,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:22:33,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:33,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:33,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:33,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:22:33,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:33,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:22:33,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:33,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:22:33,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:22:33,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:22:33,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:33,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 01:22:33,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:33,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:33,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:33,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:22:33,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:33,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:22:33,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:33,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:22:33,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:22:33,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:22:33,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:33,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-27 01:22:33,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:33,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:33,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:33,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:22:33,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:33,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:22:33,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:33,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:22:33,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:22:33,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:22:33,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:33,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-27 01:22:33,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:33,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:33,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:33,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:22:33,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:33,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 01:22:33,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:33,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:22:33,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:22:33,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:22:33,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:33,263 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 01:22:33,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902058157] [2020-10-27 01:22:33,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:22:33,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 01:22:33,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526320315] [2020-10-27 01:22:33,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:22:33,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:22:33,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:22:33,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:22:33,266 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand 9 states. [2020-10-27 01:22:33,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:22:33,792 INFO L93 Difference]: Finished difference Result 71 states and 85 transitions. [2020-10-27 01:22:33,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:22:33,793 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-10-27 01:22:33,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:22:33,795 INFO L225 Difference]: With dead ends: 71 [2020-10-27 01:22:33,795 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 01:22:33,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:22:33,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 01:22:33,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2020-10-27 01:22:33,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 01:22:33,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2020-10-27 01:22:33,809 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 50 [2020-10-27 01:22:33,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:22:33,810 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2020-10-27 01:22:33,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:22:33,811 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2020-10-27 01:22:33,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 01:22:33,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:22:33,813 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:22:33,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:22:33,813 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:22:33,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:22:33,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1447791037, now seen corresponding path program 1 times [2020-10-27 01:22:33,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:22:33,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765421280] [2020-10-27 01:22:33,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:22:33,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:33,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:35,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:35,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 01:22:35,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:35,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1608 [2020-10-27 01:22:35,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:35,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:22:35,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 01:22:35,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:22:35,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:35,550 ERROR L253 erpolLogProxyWrapper]: Interpolant 16 not inductive [2020-10-27 01:22:35,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:22:35,552 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:851) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:155) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:256) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:150) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:326) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:241) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-10-27 01:22:35,558 INFO L168 Benchmark]: Toolchain (without parser) took 21591.50 ms. Allocated memory was 163.6 MB in the beginning and 489.7 MB in the end (delta: 326.1 MB). Free memory was 138.2 MB in the beginning and 200.0 MB in the end (delta: -61.8 MB). Peak memory consumption was 292.1 MB. Max. memory is 8.0 GB. [2020-10-27 01:22:35,558 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 163.6 MB. Free memory is still 135.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 01:22:35,559 INFO L168 Benchmark]: CACSL2BoogieTranslator took 580.36 ms. Allocated memory is still 163.6 MB. Free memory was 137.4 MB in the beginning and 115.1 MB in the end (delta: 22.3 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-10-27 01:22:35,560 INFO L168 Benchmark]: Boogie Preprocessor took 72.67 ms. Allocated memory is still 163.6 MB. Free memory was 115.1 MB in the beginning and 112.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-10-27 01:22:35,561 INFO L168 Benchmark]: RCFGBuilder took 835.77 ms. Allocated memory is still 163.6 MB. Free memory was 112.2 MB in the beginning and 67.1 MB in the end (delta: 45.1 MB). Peak memory consumption was 45.1 MB. Max. memory is 8.0 GB. [2020-10-27 01:22:35,562 INFO L168 Benchmark]: TraceAbstraction took 20085.19 ms. Allocated memory was 163.6 MB in the beginning and 489.7 MB in the end (delta: 326.1 MB). Free memory was 66.6 MB in the beginning and 200.0 MB in the end (delta: -133.4 MB). Peak memory consumption was 220.8 MB. Max. memory is 8.0 GB. [2020-10-27 01:22:35,565 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 163.6 MB. Free memory is still 135.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 580.36 ms. Allocated memory is still 163.6 MB. Free memory was 137.4 MB in the beginning and 115.1 MB in the end (delta: 22.3 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 72.67 ms. Allocated memory is still 163.6 MB. Free memory was 115.1 MB in the beginning and 112.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 835.77 ms. Allocated memory is still 163.6 MB. Free memory was 112.2 MB in the beginning and 67.1 MB in the end (delta: 45.1 MB). Peak memory consumption was 45.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 20085.19 ms. Allocated memory was 163.6 MB in the beginning and 489.7 MB in the end (delta: 326.1 MB). Free memory was 66.6 MB in the beginning and 200.0 MB in the end (delta: -133.4 MB). Peak memory consumption was 220.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...